1. All are relations because a relation is any set of ordered pairs (points); A graph is just a set of ordered pairs.
2. A, B, E, and G are functions:
C is not a function becuase the input of -2 has two different outputs.
D is not a function because it does not pass the vertical line test
F is not a function because the input of -4 has many different outputs.
H is not a function because when x=0, y could be 1 or -1 (so it has two outputs)
1. All are relations because a relation is any set of ordered pairs (points); A graph is just a set of ordered pairs.
2. A, B, E, and G are functions:
C is not a function becuase the input of -2 has two different outputs.
D is not a function because it does not pass the vertical line test
F is not a function because the input of -4 has many different outputs.
H is not a function because when x=0, y could be 1 or -1 (so it has two outputs)